Link protobuf statically

[nilsnolde]

WIP

this will allow the python bindings to link to a static protobuf library which will circumvent problems with the qgis python console. it's a little patchy still, at some point we might want to include tile building and depend on spatialite which will cause the same problem. there's a good chance though that spatialite static is in debian's package manager and is compiled with position-independent-code 🤞

still needs:

• choose a protobuf tag. probably latest, cmake wasn't introduced until very recently
• smth is messed up with pre-commit
• update the manylinux image to have the image built protobuf from source
• adapt and test windows in qgis (comment: couldn't make static linking of protobuf work on windows, maybe bcs libvalhalla is linking dynamically.. actually it took the protobuf-lite.lib but still the resulting .pyd would, maybe additionally, link to the .dll)
• adapt and test mac os in qgis 🤞 (didn't actually test it works in qgis, but only built the lib on mac)

[nilsnolde]

so this seems to work for linux now. I'll push the manylinux package for python 3.10 to the network analyst repo, so we have smth to work with in dev. adding macos and win can come later, but should happen before we push to master.

[nilsnolde]

valhalla was also updated to the latest commit